Skyboat Kafetegia, Behatokia by Xin Yuan

Skyboat Kafetegia, Behatokia by Xin Yuan is a highly esteemed winner of the very prestigious 2022 Urrezko Saria A' Design Award in Arkitektura, Eraikin eta Egitura Diseinua Competition Category.

UrreArkitektura· 2022

Skyboat Kafetegia, Behatokia

by Xin Yuan

Client: XinY structural consultants

Urrezko Saria A' Design Award Winner in Arkitektura Category

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The Design

About Skyboat Kafetegia, Behatokia

Skyboat bi solairuko eraikina da, Txinako Leye herrian dagoen 613 metroko sakonerako leize baten gainean kokatua. Hoteleko gelak beheko solairuan daude, kafetegia lehenengo solairuan eta behatoki-plataforma teilatuan. Plataformak 10 x 12,5 metroko beirazko zoru zapalgarri bat du. Eraikinak leizearen goialdeko pasabide estua zeharkatzen du eta 34 metro eta 22 metroko hegalak ditu mendi-gailurraren alde banatan. Grabitate-zentro baxu bati esker, egiturak bere burua orekatzen du. Bost euskarri baino ez dira erabiltzen, eta horrek bertako landareei eragindako kaltea mugatzen du.

The Recognition

About the Urrezko Saria A' Design Award

Skyboat Kafetegia, Behatokia Urrezko Saria A' Design Award irabazlea da, lehen mailako, zoragarriak eta nabarmenak diren diseinuei ematen zaien aitorpen izugarri prestijiotsua. Urre-mailako irabazleak berrikuntzaz beteriko, ikuspegi handiko eta distiraz liluragarriak diren sorkuntzak dira, beren diseinatzaileen genioa, jakituria eta trebetasuna islatzen dutenak. Skyboat Kafetegia, Behatokia oso goraipatua, joera-markatzailea eta monumentala den asmakizuna izatea espero da, balio aurrekaririk gabea eskaintzen duena. Urrezko Saria A' Design Award irabazi duen diseinu hau proiektu ikusgarri eta errespetatua da, artearen, zientziaren, diseinuaren eta teknologiaren mugak oso onuragarriro zabaltzen dituena. Skyboat Kafetegia, Behatokia desira-sentimendu biziak sortzen dituen, grina pizten duen, sormena bultzatzen duen eta liluratzen gaituen lana da.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties: The structure cantilevers 36m over the 613m deep sinkhole. The top of the sinkhole is extremely narrow which can only accommodate a small passageway. Skyboat is proposed to span over the passageway and cantilever out to each side of the mountain ridge. Similar to the tumbler toys, it is proposed to lower the structure centre of gravity and utilize the minimum area (10metres by 30metres), in which way, the self-balance of the structure is therefore achieved.
Dimensions & Packaging: two-storey building consisting of hotel rooms at the ground floor, a café at the first floor and a roof viewing platform which contains a 10metre-by-12.5metre walk-on glass floor. The building comprises a construction area of 495m2 and covers a plan dimension of 10metres by 80metres. Both ends of the building cantilevers out by 34metres and 22metres respectively. The total steel weight used is 438 tonne.
Tags: Skyboat, XinY, Glass floor, Cantilever, Leye, Dashiwei
Production Technology: There are only five supports proposed. This minimizes the damages to the local vegetation.

To protect the local plants and rivers, hanging falsework was used during the construction stage and to have the structural members installed by pieces.
Design Challenge: The structure cantilevers 36m over the 613m deep sinkhole. The top of the sinkhole（the site）is extremely narrow which can only accommodate a small passageway.
A long crack at the site indicates the site is not stable. Apart from grouting the existing crack, it is also proposed to have the key struts at each ends of the building inclining towards the ridge, the horizontal component forces from which then provided the embracing forces to the ridge and hence improved the stability of the site.
Research: The structural system and component arrangements were adapted to the force distribution, perfectly aligned with the elegant architectural geometry.
By increasing the key strut lengths, the pre-cambering of the front cantilever structure is then achieved, which can compensate the deflections under the dead loads and some of the live loads. This also protects the glazings from large deformations.
Inspiration: A big goose, a e tumbler toy.

The long crack at the top of the ridge indicates the site is not stable. Apart from grouting the existing crack, it is also proposed to have the key struts at each ends of the building inclining towards the ridge, the horizontal component forces from which then provided the embracing forces to the ridge and hence improved the stability of the site.
Project Duration: The project started on 2018 in Leye China and finished on 2019.
Operation Flow: Visitors can enjoy coffee in the beauty of nature, or they can walk on the glass floor above the 600-meter deep pit to experience the shock of their heartbeats.
Team Members: Structural Engineers:XinY & Yuanlizhu
Client:Guangxi Leye DashiWei
Architect:Zhong Huaying Studio
Codesign:LiLi & Shanghai ZhongJian Architectural Design
Principal Contractor:China Railway 25th Group 6th Company
Image Credits: Image#1: Photographer Li Jin, Yongheng,2019.
Image#2: Photographer Yongheng, Yongheng,2019.
Image#3: Photographer Yongheng, Yongheng,2019.
Image#4: Photographer Xin Yuan, XinY,2019.
Image#5: Photographer Yongheng, Yongheng,2019.
Video Credits: Yongheng